Improvement in sugar-boilers



W. GRAHAM. Apparatus for' Boiling Sugar.

Patented Mmh 10, 1843.;

N. PETERS. FholQ-Lllhographcr. wamin mm D c.

UNITED STATES PATENT OF ICE,

WM. GRAHAM, or sT. CHARLES PARISH, LOUISIANA.

lM PROVEMENT IN SUGAR-BOILERS.

Specification iorming part of Letters Patent No. 3.000, dated March 10,1843.

To all whom, it may concern Be it known that I, XVILLIAM GRAHAM, of theparish of St. Charles, in the State of Louisiana, have invented anew anduseful Improvement in Making Sugar, which is described as follows,reference being had to the annexed drawing of the same, making part ofthis specification.

The figure is a vertical section of the evaporating-kettles, &c.

The evaporating-kettles A,in which the j nice is evaporated, are made ofcopper or other suitable material, of different sizes, and are arrangedon different levels, the largest in this arrangement being the highest,the kettles gradually diminishingin size from the kettle termed theGrand A to that which istermed the Battery A, the upper edge of eachkettle being placed nearly on a level with the bottom of the precedingone, and communicating the one with the other by suitable tubes, 13,provided with cocks O for opening or closing the communication from oneboiler to the other.

The evaporators A are placed. in semispherical cast iron or othermetallic shells or jackets, D, of larger size than the evaporators, somade and arranged as to leave a space, E, between the two to admit steamfrom a common boiler, by which the evaporators are to be heated, thesteam being admitted through branch tubes F of a main tube, G, leadingfrom the steam-boiler, all of said tubes being furnished with stop-cocksfor regulating the admission of the steam, and consequently the degreeof heat required. The evaporators are provided with pipes and cooks forletting ofi' the liquid from one to the other.

The condensed steam is made to flow back into the boiler constantly byarranging the main steam-pipe immediately beneath the kettles, in aposition inclining upward from the boiler, with vertical branch tubesleading into the same from the lower part of the jackets, through whichthe steam is admitted to the spaces between the jackets and kettles,and'by which the condensed steam is suffered to flow back into theboiler by its gravity, thereby preventing the evaporation of the steamby keep ing it constantly inclosed from the atmosphere.

I do not claim the sugar-kettles surrounded by jackets, nor theapplication of high-pressure steam for heating them; but

WVhat I do claim as my invention,- and which I desire to secure byLetters Patent, is

Arranging the main steam-pipeimmediatel y beneath the said kettles, in aposition inclining upward from the boiler, with vertical branch tubesleading into the same from the lower parts of the jackets, through whichthe steam 'isadmitted to the spaces between the jackets and kettles, andby which the condensed steam is suffered to fiow back into the boiler byits, gravity, thereby preventing any evaporation of the steam by keepingit constantly inclosed from the atmosphere.

XVILLIAM GRAHAM.

WVitnesses:

. F. CHAIX,'

F. T. TATRAUOHE.

